Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., Moscow 119991, Russia.
Higher Chemical College of the Russian Academy of Sciences, D. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya sq., Moscow 125047, Russia.
Sensors (Basel). 2022 Dec 14;22(24):9800. doi: 10.3390/s22249800.
The atmospheric pressure solvothermal (APS) synthesis of nanocrystalline SnO (average size of coherent scattering regions (CSR)-7.5 ± 0.6 nm) using tin acetylacetonate as a precursor was studied. The resulting nanopowder was used as a functional ink component in microextrusion printing of a tin dioxide thick film on the surface of a Pt/AlO/Pt chip. Synchronous thermal analysis shows that the resulting semiproduct is transformed completely into tin dioxide nanopowder at 400 °C within 1 h. The SnO powder and the resulting film were shown to have a cassiterite-type structure according to X-ray diffraction analysis, and IR spectroscopy was used to establish the set of functional groups in the material composition. The microstructural features of the tin dioxide powder were analyzed using scanning (SEM) and transmission (TEM) electron microscopy: the average size of the oxide powder particles was 8.2 ± 0.7 nm. Various atomic force microscopy (AFM) techniques were employed to investigate the topography of the oxide film and to build maps of surface capacitance and potential distribution. The temperature dependence of the electrical conductivity of the printed SnO film was studied using impedance spectroscopy. The chemosensory properties of the formed material when detecting H, CO, NH, CH, CHO and CHOH, including at varying humidity, were also examined. It was demonstrated that the obtained SnO film has an increased sensitivity (the sensory response value was 1.4-63.5) and selectivity for detection of 4-100 ppm CHOH at an operating temperature of 200 °C.
采用乙酰丙酮锡作为前驱体，通过大气压力溶剂热（APS）法合成了平均晶粒尺寸为 7.5 ± 0.6nm 的纳米晶 SnO。所得纳米粉末用作微挤压打印 Pt/AlO/Pt 芯片表面二氧化锡厚膜的功能油墨成分。同步热分析表明，所得半产品在 400°C 下 1 小时内完全转化为二氧化锡纳米粉末。X 射线衍射分析表明，SnO 粉末和所得薄膜具有金红石型结构，红外光谱用于确定材料组成中的官能团组。使用扫描（SEM）和透射（TEM）电子显微镜分析了二氧化锡粉末的微观结构特征：氧化物粉末颗粒的平均尺寸为 8.2 ± 0.7nm。采用各种原子力显微镜（AFM）技术研究了氧化物薄膜的形貌，并绘制了表面电容和电势分布图。使用阻抗谱研究了打印 SnO 薄膜的电导率随温度的变化。还研究了形成的材料在检测 H、CO、NH、CH、CHO 和 CHOH 时的化学感测性能，包括在不同湿度下的性能。结果表明，所获得的 SnO 薄膜在 200°C 的工作温度下对 4-100ppm CHOH 的检测具有更高的灵敏度（感应响应值为 1.4-63.5）和选择性。
